Sungshin CM Co., Ltd.

ENG

Introduction of products

Production capacity

The melted slag generated when pig iron is manufactured in domestic steelworks is taken out of a blast furnace, made in the form of small grains of sand by rapidly cooling it, and pulverized into fine powder by a crusher. In addition, it is produced and sold in a factory with an annual production capacity of 600,000 tons in Sinpyeong-myeon, Dangjin-si, Chungcheongnam-do, Korea.

Characteristics of ground granulated blast-furnace slag

The ground granulated blast-furnace slag is produced under strict quality control in accordance with Korean Industrial Standards (KS F 2563).

Use

Type use characteristic
Ground granulated blast-furnace slag _ type 1 Special cement for the ultra-high strength and acid resistance of high-strength concrete
  • High-strength and high-durability concrete using low heat of hydration
  • High resistance to acidic sea water, sewage, etc.
Injection material for crack repair
  • Excellent permeability when used for repair and reinforcement of microcracks
Bricks, blocks, and boards Excellent workability, economy, durability, and waterproofness
  • Ground granulated blast-furnace slag _ type 2
Special cement for early strength/
fire resistance of highly flowing concrete
Solidifying agent and soil conditioner
  • Securing water-tightness during the waste solidification process
  • The enhancing effect of the interfacial properties of soil particles and the bonding force between the particles
Slag cement
  • Securing economic feasibility by using a substitution material for cement
  • Low heat and excellent permeability, workability, and long-term strength
Ground granulated blast-furnace slag _type 3 Ordinary concrete
Silicate fertilizer
  • High resistance to harmful insects or pests
  • Enhanced lodging resistance and excellent effect of yield increase

Quality standards for ground granulated blast-furnace slag (KS F 2563)

Item KS Specifications (KS F 2563)
Type 1 Type 2 Type 3 Type 4
Density(g/cm²) 2.80 or higher 2.80 or higher 2.80 or higher 2.80 or higher
Specific surface area(cm²/g) 8,000~10,000 6,000~8,000 4,000~6,000 2,750~3,500
Activity index(%) 7 days 95 or higher 75 or higher 55 or higher -
28 days 105 or higher 95 or higher 75 or higher 60 or higher
91 days 105 or higher 105 or higher 95 or higher 80 or higher
Flow value ratio(%) 95 or higher 95 or higher 95 or higher 95 or higher
MgO(%) 10.0 or less 10.0 or less 10.0 or less 10.0 or less
SO3(%) 4.0 or less 4.0 or less 4.0 or less Higher than 2.5 but less than 4.0
Ignition loss(%) 3.0 or less 3.0 or less 3.0 or less 3.0 or less
Chloride ion(%) 0.02 or less 0.02 or less 0.02 or less 0.02 or less

Physical

Type Density(g/cm²) Mean particle diameter(μm) Residue(45μm,%) Specific surface area(cm²/g) Water content(%)
Ground granulated blast-furnace slag Type 1 2.80~2.95 2~4 - 8,000~10,000 0.4 or less
Type 2 5~8 - 6,000~8,000
Type 3 8~12 3.0 or less 4,000~6,000

Chemical characteristics(wt%)

SiO₂ AI2O₂ Fe₂O₂ CaO MgO SO₂ Ignition loss
32.0~38.0 12.0~16.0 0.3~0.8 40.0~46.0 8.0 or less 4.0 or less 3.0 or less

Status of Certificates from External Certificate Authorities

2010. 09. 08

KS Certificate (KS F 2563): 3-type ground granulated blast-furnace slag